Stretching device of bottle blowing machine

Abstract

The utility model provides a stretching device of a bottle blowing machine. The stretching device comprises a stretching bracket, a stretching mechanism and a driving mechanism, the stretching support comprises an upper supporting plate, a lower supporting plate arranged below the upper supporting plate in parallel, and a side supporting plate connected with the upper supporting plate and the lower supporting plate. The stretching mechanism comprises a stretching seat slidably arranged on the front side of the side supporting plate and a stretching rod fixedly arranged at the upper end of the stretching seat; the driving mechanism comprises a servo motor fixedly arranged on the rear side of the upper end of the lower supporting plate, a driving gear fixedly arranged at the output end of the servo motor and a transmission rack fixedly arranged on the stretching base. A main rotating seat is arranged on the front side of the upper end of the lower supporting plate, and the upper end of the main rotating seat is rotationally connected with an abutting rotating wheel. The abutting rotating wheel rotationally arranged on the main rotating base rotates in the circumferential direction along with the transmission rack, friction between the lower supporting plate and the transmission rack is converted into rolling friction, and therefore the stretching device operates more smoothly.

Description

A stretching device for a blow molding machine Technical Field

[0001] This utility model relates to parts for blow molding machines, and in particular, to a stretching device for blow molding machines. Background Technology

[0002] Currently, Chinese patent CN207273840U discloses a servo motor stretching mechanism for a fully automatic plastic blow molding machine, including a stretching bracket, a stretching structure, and a drive structure. The stretching bracket includes an upper support plate, a lower support plate parallel to the upper support plate below it, and a support rod connecting the upper and lower support plates. The stretching structure includes a stretching plate disposed between the upper and lower support plates and a stretching rod disposed on the stretching plate. The drive structure includes a servo motor disposed below the stretching bracket, a coupling gear disposed at the output end of the servo motor, and a rack disposed at the lower end of the stretching plate, with the coupling gear meshing with the rack. However, in the above stretching mechanism, the rack abuts against the coupling gear and the lower support plate on both sides respectively. Thus, during the rack's up-and-down sliding process, the sliding friction between the lower support plate and the rack will significantly hinder the rack's sliding, affecting the smooth operation of the stretching mechanism. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a stretching device for a blow molding machine, which has the advantage of smoother operation.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a stretching device for a blow molding machine, including a stretching bracket, a stretching mechanism and a driving mechanism; the stretching bracket includes an upper support plate, a lower support plate arranged parallel to the lower part of the upper support plate, and a side support plate connecting the upper support plate and the lower support plate, wherein the side support plate is provided with a clearance through hole from front to back.

[0005] The tensioning mechanism includes a tensioning seat slidably disposed on the front side of the side support plate and a tensioning rod fixedly disposed on the upper end of the tensioning seat, wherein the tensioning rod passes through the upper support plate from bottom to top;

[0006] The drive mechanism includes a servo motor fixedly mounted on the rear side of the upper end of the lower support plate, a drive gear fixedly mounted on the output end of the servo motor, and a transmission rack fixedly mounted on the tension seat. The front side of the drive gear passes through the clearance through hole and meshes with the transmission rack.

[0007] A main rotating seat is provided on the upper front side of the lower support plate, and an abutting wheel is rotatably connected to the upper end of the main rotating seat. The outer peripheral wall of the abutting wheel abuts against the front side wall of the transmission rack.

[0008] A slide rail is provided on the upper front side of the lower support plate, and the slide rail extends from front to back. A sliding seat is provided at the lower end of the main rotating seat, and the sliding seat slides on the outside of the slide rail. A limiting mechanism is provided between the main rotating seat and the lower support plate, and the limiting mechanism is used to press and fix the main rotating seat and the lower support plate together.

[0009] With the above technical solution, during use, the servo motor drives the drive gear to rotate circumferentially, and the drive gear drives the tensioning seat and tensioning rod to move vertically through the transmission rack. At the same time, the abutment wheel, which is rotatably set on the main rotating seat, will rotate circumferentially with the transmission rack, changing the friction between the lower support plate and the transmission rack into rolling friction, making the operation of the above-mentioned tensioning device smoother.

[0010] The abutting wheel will cooperate with the drive gear to clamp and limit the transmission rack, so that the transmission rack is not prone to skewing during movement.

[0011] The slide rail and sliding seat cooperate to slide and connect the main rotating seat and the lower support plate. Thus, when assembling the above-mentioned tensioning device, the position of the main rotating seat can be adjusted according to the size of the transmission rack to ensure that the abutting wheel can abut against the front side wall of the transmission rack. When the main rotating seat moves to the appropriate position, the limiting mechanism can press and fix the main rotating seat and the lower support plate, so that the position of the main rotating seat is fixed.

[0012] Preferably, the lower support plate has an inverted T-shaped limiting groove on its front side, the inverted T-shaped limiting groove extending from front to back and penetrating the upper end surface of the lower support plate;

[0013] The lower edge of the main rotating seat is provided with an outward flange, and the outward flange is provided with a connecting through hole from top to bottom;

[0014] The limiting mechanism includes a limiting bolt and a limiting nut. The limiting bolt is slidably disposed in the inverted T-shaped limiting groove. The threaded section of the limiting bolt passes through the connecting through hole. The limiting nut is threadedly connected to the threaded section of the limiting bolt. The limiting nut abuts against the upper end face of the outward flange.

[0015] With the above technical solution, when the position of the main rotating seat needs to be adjusted, simply loosen the limiting nut to separate it from the outer flange. When the main rotating seat moves to the appropriate position, simply tighten the limiting nut to abut against the upper surface of the outer flange. The inverted T-shaped limiting groove is located on the front side of the lower support plate, making the installation and removal of the limiting bolts more convenient.

[0016] Preferably, a buffer rubber ring is fitted on the threaded section of the limiting bolt, and the limiting nut presses and fixes the buffer rubber ring to the upper end face of the outward flange.

[0017] With the above technical solution, the buffer rubber ring is located between the limiting nut and the outer flange. It can not only protect the outer flange, but also apply an upward elastic force to the limiting nut through deformation, so as to relax it.

[0018] Preferably, a rubber protective sleeve is provided on the outer side of the abutting wheel.

[0019] Through the above technical solution, the rubber protective sleeve can not only protect the outer peripheral wall of the contact wheel, making the outer peripheral wall of the contact wheel less prone to wear, but also effectively prevent slippage between the contact wheel and the transmission rack.

[0020] Preferably, the lower end of the tension seat is provided with a secondary rotating seat, and the lower end of the secondary rotating seat is rotatably connected to an auxiliary rotating wheel, the outer peripheral wall of the auxiliary rotating wheel abutting against the front side wall of the transmission rack.

[0021] Through the above technical solution, the auxiliary rotating seat and the auxiliary rotating wheel will move with the tension seat to support the upper middle part of the transmission rack, thereby improving the stability of the transmission rack when it moves.

[0022] Preferably, the left and right sides of the auxiliary rotating seat are provided with connecting flanges, and each connecting flange is provided with a limiting guide post, which penetrates the lower support plate from top to bottom.

[0023] Through the above technical solution, the limiting guide post can limit and support the auxiliary rotating seat by connecting the flange. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the structure of an embodiment;

[0025] Figure 2 is an enlarged view of part A in Figure 1;

[0026] Figure 3 is a structural schematic diagram of the second embodiment;

[0027] Figure 4 is an enlarged view of part B in Figure 3.

[0028] Reference numerals: 1. Clearance through hole; 2. Tension bracket; 21. Upper support plate; 22. Lower support plate; 23. Side support plate; 3. Tensioning mechanism; 31. Tensioning seat; 32. Tensioning rod; 4. Drive mechanism; 41. Servo motor; 42. Drive gear; 43. Transmission rack; 5. Main rotating seat; 6. Abutting wheel; 7. Slide rail; 8. Sliding seat; 9. Limiting mechanism; 91. Limiting bolt; 92. Limiting nut; 10. T-shaped limiting groove; 11. Outer flange; 12. Connecting through hole; 13. Buffer rubber ring; 14. Rubber protective sleeve; 15. Secondary rotating seat; 16. Auxiliary wheel; 17. Connecting flange; 18. Limiting guide post. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0030] A stretching device for a blow molding machine, as shown in Figures 1 to 4, includes a stretching bracket 2, a stretching mechanism 3, and a driving mechanism 4.

[0031] The tension support 2 includes an upper support plate 21, a lower support plate 22 parallel to the lower part of the upper support plate 21, and a side support plate 23 connecting the upper support plate 21 and the lower support plate 22. The length of the upper support plate 21 is less than the length of the lower support plate 22, and the front sides of the upper support plate 21 and the lower support plate 22 are in the same vertical plane. The side support plate 23 has a through hole 1 extending from front to back.

[0032] The tensioning mechanism 3 includes a tensioning seat 31 slidably disposed on the front side of the side support plate 23 and a tensioning rod 32 fixedly disposed on the upper end of the tensioning seat 31. In this embodiment, the tensioning seat 31 is slidably connected to the side support plate 23 via a vertically disposed track, and the tensioning rod 32 passes through the upper support plate 21 from bottom to top.

[0033] The drive mechanism 4 includes a servo motor 41 fixedly mounted on the rear side of the upper end of the lower support plate 22, a drive gear 42 fixedly mounted on the output end of the servo motor 41, and a transmission rack 43 fixedly mounted on the tension seat 31. The front side of the drive gear 42 passes through the clearance hole 1 and meshes with the transmission rack 43. In use, the servo motor 41 drives the drive gear 42 to rotate circumferentially, and the drive gear 42 drives the tension seat 31 and the tension rod 32 to move vertically through the transmission rack 43.

[0034] A main rotating seat 5 is provided on the upper front side of the lower support plate 22. An abutting wheel 6 is rotatably connected to the upper end of the main rotating seat 5. The outer peripheral wall of the abutting wheel 6 abuts against the front side wall of the transmission rack 43 to support and limit the transmission rack 43. A rubber protective sleeve 14 is fitted on the outer side of the abutting wheel 6.

[0035] A slide rail 7 is provided on the upper front side of the lower support plate 22, extending from front to back. A sliding seat 8 is provided on the lower end of the main rotating seat 5, with the sliding seat 8 sliding cover located on the outside of the slide rail 7. A limiting mechanism 9 is provided between the main rotating seat 5 and the lower support plate 22 to press and fix the main rotating seat 5 and the lower support plate 22 together. In use, the operator can change the position of the main rotating seat 5 according to the size of the transmission rack 43 to ensure that the outer peripheral wall of the abutting wheel 6 can abut against the front side wall of the transmission rack 43.

[0036] A T-shaped limiting groove 10 is provided on the front side of the lower support plate 22, extending from front to back and penetrating the upper end face of the lower support plate 22. An outwardly flanged edge 11 is provided at the lower edge of the main rotating seat 5, with a connecting through hole 12 extending from top to bottom through the outer flanged edge 11. The limiting mechanism 9 includes a limiting bolt 91 and a limiting nut 92. The limiting bolt 91 is slidably disposed in the T-shaped limiting groove 10, with its threaded section passing through the connecting through hole 12. The limiting nut 92 is threadedly connected to the threaded section of the limiting bolt 91, and abuts against the upper end face of the outer flanged edge 11. A buffer rubber ring 13 is fitted onto the threaded section of the limiting bolt 91, and the limiting nut 92 presses and fixes the buffer rubber ring 13 to the upper end face of the outer flanged edge 11.

[0037] A secondary rotating seat 15 is provided at the lower end of the tension seat 31. An auxiliary rotating wheel 16 is rotatably connected to the lower end of the secondary rotating seat 15. The outer peripheral wall of the auxiliary rotating wheel abuts against the front side wall of the transmission rack 43 to support and limit the upper middle part of the transmission rack 43. Connecting flanges 17 are provided on both the left and right sides of the secondary rotating seat 15. Each connecting flange 17 is provided with a limiting guide post 18, which extends from top to bottom through the lower support plate 22.

[0038] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A stretching device for a blow molding machine, comprising a stretching bracket (2), a stretching mechanism (3), and a driving mechanism (4); characterized in that: The tension support (2) includes an upper support plate (21), a lower support plate (22) parallel to the lower part of the upper support plate (21), and a side support plate (23) connecting the upper support plate (21) and the lower support plate (22). The side support plate (23) has a through hole (1) extending from front to back. The tensioning mechanism (3) includes a tension seat (31) slidably disposed on the front side of the side support plate (23) and a tension rod (32) fixedly disposed on the upper end of the tension seat (31). The tension rod (32) extends from bottom to top through the upper support plate (21). The driving mechanism (4) includes a servo motor (41) fixedly disposed on the rear side of the upper end of the lower support plate (22), a drive gear (42) fixedly disposed on the output end of the servo motor (41), and a transmission rack (43) fixedly disposed on the tension seat (31). The front side of the drive gear (42) passes through the clearance through hole (1) and meshes with the transmission rack (43); a main rotating seat (5) is provided on the upper front side of the lower support plate (22), and an abutting wheel (6) is rotatably connected to the upper end of the main rotating seat (5). The outer peripheral wall of the abutting wheel (6) abuts against the front side wall of the transmission rack (43); a slide rail (7) is provided on the upper front side of the lower support plate (22), and the slide rail (7) extends from front to back. A sliding seat (8) is provided on the lower end of the main rotating seat (5), and the sliding seat (8) is slidably covered on the outside of the slide rail (7). A limiting mechanism (9) is provided between the main rotating seat (5) and the lower support plate (22), and the limiting mechanism (9) is used to press and fix the main rotating seat (5) and the lower support plate (22).

2. The stretching device for a blow molding machine according to claim 1, characterized in that: The lower support plate (22) has an inverted T-shaped limiting groove (10) on its front side. The inverted T-shaped limiting groove (10) extends from front to back and penetrates the upper end face of the lower support plate (22). The lower edge of the main rotating seat (5) is provided with an outward flange (11). The outward flange (11) is provided with a connecting through hole (12) from top to bottom. The limiting mechanism (9) includes a limiting bolt (91) and a limiting nut (92). The limiting bolt (91) is slidably disposed in the inverted T-shaped limiting groove (10). The threaded section of the limiting bolt (91) passes through the connecting through hole (12). The limiting nut (92) is threadedly connected to the threaded section of the limiting bolt (91). The limiting nut (92) abuts against the upper end face of the outward flange (11).

3. The stretching device for a blow molding machine according to claim 2, characterized in that: A buffer rubber ring (13) is fitted on the threaded section of the limiting bolt (91), and the limiting nut (92) presses and fixes the buffer rubber ring (13) to the upper end face of the outer flange (11).

4. The stretching device for a blow molding machine according to claim 1, characterized in that: The outer side of the abutting wheel (6) is fitted with a rubber protective sleeve (14).

5. The stretching device for a blow molding machine according to claim 1, characterized in that: The lower end of the tension seat (31) is provided with a secondary rotating seat (15), and the lower end of the secondary rotating seat (15) is rotatably connected to an auxiliary rotating wheel (16). The outer peripheral wall of the auxiliary rotating wheel (16) abuts against the front side wall of the transmission rack (43).

6. The stretching device for a blow molding machine according to claim 5, characterized in that: The auxiliary rotating seat (15) is provided with connecting flanges (17) on both the left and right sides. Each connecting flange (17) is provided with a limiting guide post (18), which passes through the lower support plate (22) from top to bottom.

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